Carburetor



Jan. 24, 1928 d I 5 C. BALL 1,657,058

CARBURETOR vlled Feb. 16. 1923 2 Sheets Sh eet l Jan.. 24, 1928.1,657,058

B. C. BALL CARBURETOR Filed Feb.l6. 1923 2 Sheets-Sheet 2 Patented Jan.,24, lZtS.

-uulrsosares rarer ori-1on1 BERT C. BALL, OF PORTLAND, OREGON.

CARBURETOR.

Application filed February 16, 1923. Serial No. 619,385.

:lt is desirable in controlling the flow ol" fuel and air to carburetorsto varythe proportions of the mixture under certain conditions. ln seinetypes o'tcarburetors the fuel is delivered to a spray'passage andcarriedy 1n the forni of a spray to the mixture pas-` livered as thethrottle is opened.k l prefer" also to `control the air passage inconnection with a choke valve so that the mixture will be enriched notonly by the reduction in pressure incident to the closingy of the chokeyvalve but alsoby reason of the greater restriction or expulsion `of airthrough the spray passage. Other details and features of the invent-ionwill appear from the specification and claims.

The invention is illustrated in the accompanying drawings as follows:-

Fig. 1 shows a central vertical section' through the carburetor.

Fig. 2 a side elevation of the carburetor.

Fig. 3 a section on the line 3-8 in Fig. 9;.

Fig. l a side elevation7 partlyin section, on the line 4 4 in Fig. 3.

Fig. 5 a view Vsimilar to Fig. the parts in a different position.

Fig. G a section on the line time iu Fig. 4t.

Fig. 7 a plan view of one of the valve seats showing the port leading tothe spray passage.

'l marks the carburetor body. This has a mixture passage Q extendingthrough it. The usual Vent-uri tube 3 is arranged in the mixture passageandy spray nozzles t lead into the Venturi tube. A throttle valve 5 :isfixed on the shaft 6. `lt is of the butterfly type and controls themixture passage in the usual manner. A cholre valve 7 is mounted on ashaft 8 and at the inlet end of the ininture passage and operates in theusualmanner. A lever 9 is fixed on the shaft 6 and a throttle controlrod 10 leads from the lever 9. similar lever 11 is fixed on the shaft 4tbut with passage 24.

a fuel well 29.

` of this type.

8 and the usual choke rod l2 leads fromthe lever l1. A 1doat chamber 13has an rinlet passage le. This is controlled by a float valve 15. `Astern 16 extends from the float valve 15. A spoolI 17` is arranged onthestein. Levers 18 engage the spool 17 and are in position tobejactuatedby a float 19 in the usual manner.

A discharge passage' 2O leads from the float chamber to a vertical fuelpassage 21. A plug screw 22 is arranged in the passage 21. lt has theradial openings 23 communieating with the passage 21 andhas a central Ametered opening 25 is ai ranged at the end of a plug @Tentendingdownwardly into the passage 21, the plug 27 having a central passage 2Ginto which the vmetered opening leads. Radial openings 28' lead throughthe walls of the `plug 27 into The fuel well 29 communicates by a spraypassage 30 with an 'annular passage 31 surrounding the Venturi tube andfrom which the spray nozzles 4 extend. i

The operation of this part of the carbuH retor follows the operation ofcarburetors Fuel is delivered by gravity and suction through thepassages 28 tothe well 29. Air is delivered to the well 29 in the mannerdescribed hereafter andV sweeps up the fuel and carries it in Vthe forrnof Y.

a spray through the spray nozzles. The pressure in the well varies withthe pressure in the mixing chamber. the reduced pressure beingcommunicated 'through the nozzles. Thisipressure in the well may bevaried by controlling the inflow of air to the well and in the presentinvention as heretofore stated this is utilized in varying the richnessof the mixture.

A spray valve control post 32 extends 'from the body of the carburetoi`and leads from the well 29. This has a port opening S-t which leads to acentral passage 33 in the post. A valve 35 is rotatively mounted on thepost and this has a port 36 which is adapted to be moved into and out ofregister with the port 34. A screw 39 extends into the opening 33 in thepost and secures the valve on the post, this screw having a con tralpassage l0 which communicates with the passage 33 and the ports throughradial passages 39a. y A lever /11 extends from the valve and this isconnected by a link t2 with the Athrottle control lever 9 so that as thethrottle is opened the valve 35 is moved and graduullycloses, orlnezujlycloses the vulve ope11- ingetlnouglrtlie :ports 34 zriul-jl=\viien thethrottle heb' reached o predetermined intermediate position where thericher mixture is desired. By vmfyog the Shapes ofthe "ports thefnrieton in Vthe mixture may be changed es desired to correspond withdlll'eient throttle openings. AsA shown the port 34; is TShoped, themoin part of the opening heving e; fairlylwideopening 3T which is perVnunlently open .und a. nunnyport opening 38 which islclosedfesthe valveie swung. p

In order tolnmkethe choke vulve uitluence the feeding of fuel thnoughthe nir to the `Sploy passage thewelve has on enclosed ehzunher l2-3over ,the port; 3o from, which. e port ll leads to avolafelopening45. Aport lends to the vnlveopenng-lond e vulve -l' slides in the opening 45.A; spring link t8 valve"independently] of this li11k:'l11d the V springbeing` designed` to` perintloi the free -1nove1nent Vof the valve 35with the choke rulveopen as indicated i1rl1`ig..5. ln startling wththechoke valve nearly closed the Valve 17 4is moved tore.. position`closing the `ports i6 und tend consequently closes oli -the uirtothespray passages() thutthe fuel is subjected `to the full `Suctionelloreof the nnxture passage und zml'eryrlch flow of nux- -tu1e`fo1lows-Asthe choke valvole opened the: valve et? is thrown 'out ot' action `andhas no :further `influence on the introduction of fau'.

connecte the vulve All with the .lever 1l, this llink lnivlng uelotte-.dend :it Seo neto e eome treedoln ot'` movement;tothe choke 711ML I claimes new is :n l" In n Cmbmmmftflle eothhnmtimr 01 a nnxlurepnesuge; :ithi-0m@ wlmi :mld pw `spraylpessogel; e `rotery entre on SuidSe-at; a.connection between seid rotaryY vulve "und the throttlefvnlvepehokecontrolled vulve pcerriedbyfthe rotary vulve; :uidm connectonbetWeen thechoke controlled uulreenfl the choke Naive. l y

3. In :i`em'lmreorj the ,combination ,of n mixture passage; trtlnfotllovolvo iu `the peek enge.; ochoke vulve in the pee-enge; it Sprayjziarsszrge leading to Athe mixture pzleeuge; :i rotary vulve seathaving `ports leerling tofthe spray pnesoge; u rot-ary -vzrlve on seidsont;

,o connection.between said rotory vulve und the throttle valve; te chokecontrolled vetro lcarried by therotery ralvegpend nV connecl tionbetween Vthe choke controlled vulve und :the choke valve, Suidconnection huviligg sleek perlnittillg the movement off the rotary mireAwith the choke valve.stationery. l

in testimony Whereofl.llzwehereunto set my hand.

BERT. C. BALL.

rotarywrolve sent hzwngporte leedngto the f Til

